> Sometimes, CD- and DVD-Rs were burned at high speeds with high error rates that were normally fixed on the fly by error-correcting code. This can make it more

> Sometimes, CD- and DVD-Rs were burned at high speeds with high error rates that were normally fixed on the fly by error-correcting code. This can make it more difficult for modern optical disc drives to read them, so try them on an older drive, if possible. Does that mean drives were first made with relatively robust ECC, and they just stopped using it for later drives? What would be the motivation to drop that?